CCNA_ERouting_Chapter_4

1Which event will cause a triggered update?an update routing timer expiresa corrupt update message is receiveda route is installed in the routing tablethe network is converged2Three routers running a distance-vector routing protocol lost all power, including the battery backups. When the routers reload, what will happen?They will share all routes saved in NVRAM prior to the power loss with their directly connected neighbors.They will multicast hello packets to all other routers in the network to establish neighbor adjacencies.They will send updates that include only directly connected routes to their directly connected neighbors.They will broadcast their full routing table to all routers in the network.3What is a routing loop?a packet bouncing back and forth between two loopback interfaces on a routera condition where a return path from a destination is different from the outbound path forming a loopa condition where a packet is constantly transmitted within a series of routers without ever reaching its intended destinationthe distribution of routes from one routing protocol into another4Refer to the exhibit. If all routers are using RIP, how many rounds of updates will occur before all routers know all networks?123456窗体底端5窗体顶端What actions will occur after RouterA loses connectivity to network ? (Choose two.)RouterB will include network and in its update to RouterA.During the next update interval, RouterB will send a RIP update out both ports that includes the inaccessible network.During the next update interval, RouterC will send an update to RouterB stating that network is accessible in 2 hops.Router C will learn of the loss of connectivity to network from RouterB.RouterB will include network and in its update to RouterC.窗体底端6窗体顶端What does the RIP holddown timer do?ensures an invalid route has a metric of 15prevents a router from sending any updates after it has introduced a routing loop into the networkensures every new route is valid before sending an updateinstructs routers to ignore updates, for a specified time or event, about possible inaccessible routes 窗体底端7窗体顶端Which of the following can exist in a distance vector network that has not converged? (Choose three.)routing loopsinconsistent traffic forwardingno traffic forwarding until system convergesinconsistent routing table entriesrouting table updates sent to wrong destinations窗体底端8窗体顶端What is the purpose of the TTL field in the IP header?used to mark routes as unreachable in updates sent to other routersprevents regular update messages from reinstating a route that may have gone badprevents a router from advertising a network through the interface from which the update camelimits the time or hops that a packet can traverse through the network before it should be discardeddefines a maximum metric value for each distance vector routing protocol by setting a maximum hop count窗体底端9窗体顶端Which three routing protocols are distance vector routing protocols? (Choose three).RIPv1EIGRPOSPFIS-ISRIPv2窗体底端10窗体顶端The graphic shows a network that is configured to use RIP routing protocol. Router2 detects that the link to Router1 has gone down. It then advertises the network for this link with a hop count metric of 16. Which routing loop prevention mechanism is in effect?split horizonerror conditionhold-down timerroute poisoningcount to infinity窗体底端11窗体顶端Which statement is true regarding ciscos RIP_JITTER variable?It prevents the synchronization of routing updates by buffering the updates as they leave the router interfaces.It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update interval.It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time.It prevents the synchronization of routing updates by forcing the router to listen when its time for other updates on the lines before sending its update.窗体底端12窗体顶端Which of the following methods does split horizon use to reduce incorrect routing information?Routing updates are split in half to reduce the update time.Information learned from one source is not distributed back to that source.New route information must be learned from multiple sources to be accepted.The time between updates is split in half to speed convergence.New route information is suppressed until the system has converged.窗体底端13窗体顶端Which two statements are true regarding the function of the RIPv1 routing updates? (Choose two).updates are broadcast only when there are changes to the topologyupdates are broadcast at regular intervalsbroadcast are sent to broadcasts are sent to 55updates contain the entire network topologyonly changes are included in the updates窗体底端14窗体顶端A network administrator is evaluating RIP versus EIGRP for a new network. The network will be sensitive to congestion and must respond quickly to topology changes. What are two good reasons to choose EIGRP instead of RIP in this case? (Choose two.)EIGRP uses periodic updates.EIGRP only updates affected neighbors. EIGRP uses broadcast updates.EIGRP updates are partial.EIGRP uses the efficient Bellman-Ford algorithm.窗体底端11窗体顶端Which statement is true regarding ciscos RIP_JITTER variable?It prevents the synchronization of routing updates by buffering the updates as they leave the router interfaces.It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update interval.It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time.It prevents the synchronization of routing updates by forcing the router to listen when its time for other updates on the lines before sending its update.窗体底端12窗体顶端Which of the following methods does split horizon use to reduce incorrect routing information?Routing updates are split in half to reduce the update time.Information learned from one source is not distributed back to that source.New route information must be learned from multiple sources to be accepted.The time between updates is split in half to speed convergence.New route information is suppressed until the system has converged.窗体底端13窗体顶端Which two statements are true regarding the function of the RIPv1 routing updates? (Choose two).updates are broadcast only when there are changes to the topologyupdates are broadcast at regular intervalsbroadcast are sent to broadcasts are sent to 55updates contain the entire network topologyonly changes are included in the updates窗体底端14窗体顶端A network administrator is evaluating RIP versus EIGRP for a new network. The network will be sensitive to congestion and must respond quickly to topology changes. What are two good reasons to choose EIGRP instead of RIP in this case? (Choose two.)EIGRP uses periodic updates.EIGRP only updates affected neighbors. EIGRP uses broadcast updates.EIGRP updates are partial.EIGRP uses the efficient Bellman-Ford algorithm.窗体底端15窗体顶端Refer to the exhibit. What path will packets from the /24 network travel to reach the /8 network if RIP is the active routing protocol?The path will be router A - router B - router C - router E.The path will be router A - router D - router E.Router A will load balance between the router A - router D - router E and router A - router B - router C - router E paths.Packets will alternate paths depending on the order they arrive at router A.窗体底端Which of the following statements are correct about RIP? uses a broadcast to update all other routers in the